server/snapshot.c

   1 /*
   2  * Server-side snapshots
   3  *
   4  * Copyright (C) 1999 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  *
  20  * FIXME: heap snapshots not implemented
  21  */
  22
  23 #include "config.h"
  24 #include "wine/port.h"
  25
  26 #include <assert.h>
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <stdarg.h>
  30
  31 #include "ntstatus.h"
  32 #define WIN32_NO_STATUS
  33 #include "windef.h"
  34 #include "winternl.h"
  35
  36 #include "handle.h"
  37 #include "process.h"
  38 #include "thread.h"
  39 #include "request.h"
  40
  41
  42 struct snapshot
  43 {
  44     struct object             obj;           /* object header */
  45     struct process_snapshot  *processes;     /* processes snapshot */
  46     int                       process_count; /* count of processes */
  47     int                       process_pos;   /* current position in proc snapshot */
  48     struct thread_snapshot   *threads;       /* threads snapshot */
  49     int                       thread_count;  /* count of threads */
  50     int                       thread_pos;    /* current position in thread snapshot */
  51 };
  52
  53 static void snapshot_dump( struct object *obj, int verbose );
  54 static void snapshot_destroy( struct object *obj );
  55
  56 static const struct object_ops snapshot_ops =
  57 {
  58     sizeof(struct snapshot),      /* size */
  59     snapshot_dump,                /* dump */
  60     no_get_type,                  /* get_type */
  61     no_add_queue,                 /* add_queue */
  62     NULL,                         /* remove_queue */
  63     NULL,                         /* signaled */
  64     NULL,                         /* satisfied */
  65     no_signal,                    /* signal */
  66     no_get_fd,                    /* get_fd */
  67     no_map_access,                /* map_access */
  68     default_get_sd,               /* get_sd */
  69     default_set_sd,               /* set_sd */
  70     no_lookup_name,               /* lookup_name */
  71     no_link_name,                 /* link_name */
  72     NULL,                         /* unlink_name */
  73     no_open_file,                 /* open_file */
  74     no_kernel_obj_list,           /* get_kernel_obj_list */
  75     no_close_handle,              /* close_handle */
  76     snapshot_destroy              /* destroy */
  77 };
  78
  79
  80 /* create a new snapshot */
  81 static struct snapshot *create_snapshot( unsigned int flags )
  82 {
  83     struct snapshot *snapshot;
  84
  85     if (!(snapshot = alloc_object( &snapshot_ops ))) return NULL;
  86
  87     snapshot->process_pos = 0;
  88     snapshot->process_count = 0;
  89     if (flags & SNAP_PROCESS)
  90         snapshot->processes = process_snap( &snapshot->process_count );
  91
  92     snapshot->thread_pos = 0;
  93     snapshot->thread_count = 0;
  94     if (flags & SNAP_THREAD)
  95         snapshot->threads = thread_snap( &snapshot->thread_count );
  96
  97     return snapshot;
  98 }
  99
 100 /* get the next process in the snapshot */
 101 static int snapshot_next_process( struct snapshot *snapshot, struct next_process_reply *reply )
 102 {
 103     struct process_snapshot *ptr;
 104     struct process_dll *exe_module;
 105
 106     if (!snapshot->process_count)
 107     {
 108         set_error( STATUS_INVALID_PARAMETER );  /* FIXME */
 109         return 0;
 110     }
 111     if (snapshot->process_pos >= snapshot->process_count)
 112     {
 113         set_error( STATUS_NO_MORE_FILES );
 114         return 0;
 115     }
 116     ptr = &snapshot->processes[snapshot->process_pos++];
 117     reply->count    = ptr->count;
 118     reply->pid      = get_process_id( ptr->process );
 119     reply->ppid     = ptr->process->parent_id;
 120     reply->threads  = ptr->threads;
 121     reply->priority = ptr->priority;
 122     reply->handles  = ptr->handles;
 123     reply->unix_pid = ptr->process->unix_pid;
 124     if ((exe_module = get_process_exe_module( ptr->process )) && exe_module->filename)
 125     {
 126         data_size_t len = min( exe_module->namelen, get_reply_max_size() );
 127         set_reply_data( exe_module->filename, len );
 128     }
 129     return 1;
 130 }
 131
 132 /* get the next thread in the snapshot */
 133 static int snapshot_next_thread( struct snapshot *snapshot, struct next_thread_reply *reply )
 134 {
 135     struct thread_snapshot *ptr;
 136
 137     if (!snapshot->thread_count)
 138     {
 139         set_error( STATUS_INVALID_PARAMETER );  /* FIXME */
 140         return 0;
 141     }
 142     if (snapshot->thread_pos >= snapshot->thread_count)
 143     {
 144         set_error( STATUS_NO_MORE_FILES );
 145         return 0;
 146     }
 147     ptr = &snapshot->threads[snapshot->thread_pos++];
 148     reply->count     = ptr->count;
 149     reply->pid       = get_process_id( ptr->thread->process );
 150     reply->tid       = get_thread_id( ptr->thread );
 151     reply->base_pri  = ptr->priority;
 152     reply->delta_pri = 0;  /* FIXME */
 153     return 1;
 154 }
 155
 156 static void snapshot_dump( struct object *obj, int verbose )
 157 {
 158     struct snapshot *snapshot = (struct snapshot *)obj;
 159     assert( obj->ops == &snapshot_ops );
 160     fprintf( stderr, "Snapshot: %d procs %d threads\n",
 161              snapshot->process_count, snapshot->thread_count );
 162 }
 163
 164 static void snapshot_destroy( struct object *obj )
 165 {
 166     int i;
 167     struct snapshot *snapshot = (struct snapshot *)obj;
 168     assert( obj->ops == &snapshot_ops );
 169     if (snapshot->process_count)
 170     {
 171         for (i = 0; i < snapshot->process_count; i++)
 172             release_object( snapshot->processes[i].process );
 173         free( snapshot->processes );
 174     }
 175     if (snapshot->thread_count)
 176     {
 177         for (i = 0; i < snapshot->thread_count; i++)
 178             release_object( snapshot->threads[i].thread );
 179         free( snapshot->threads );
 180     }
 181 }
 182
 183 /* create a snapshot */
 184 DECL_HANDLER(create_snapshot)
 185 {
 186     struct snapshot *snapshot;
 187
 188     reply->handle = 0;
 189     if ((snapshot = create_snapshot( req->flags )))
 190     {
 191         reply->handle = alloc_handle( current->process, snapshot, 0, req->attributes );
 192         release_object( snapshot );
 193     }
 194 }
 195
 196 /* get the next process from a snapshot */
 197 DECL_HANDLER(next_process)
 198 {
 199     struct snapshot *snapshot;
 200
 201     if ((snapshot = (struct snapshot *)get_handle_obj( current->process, req->handle,
 202                                                        0, &snapshot_ops )))
 203     {
 204         if (req->reset) snapshot->process_pos = 0;
 205         snapshot_next_process( snapshot, reply );
 206         release_object( snapshot );
 207     }
 208 }
 209
 210 /* get the next thread from a snapshot */
 211 DECL_HANDLER(next_thread)
 212 {
 213     struct snapshot *snapshot;
 214
 215     if ((snapshot = (struct snapshot *)get_handle_obj( current->process, req->handle,
 216                                                        0, &snapshot_ops )))
 217     {
 218         if (req->reset) snapshot->thread_pos = 0;
 219         snapshot_next_thread( snapshot, reply );
 220         release_object( snapshot );
 221     }
 222 }